Bearded Iris

Somewhere on the streets of Kyoto we passed a small private garden with this bearded Iris. I understand that the way to recognize one is to count the petals. They have six, of which three are upright, three droop, and the drooping petals have a line of filaments, the beard, which guide insects to the nectar. As far as I know, this is not a natural species, so I’ll not quote a binomial.